Skill

domain-fintech:banking-apis

Guides banking API integration: Open Banking standards (PSD2, UK Open Banking, FDX), Plaid integration (Link, transactions, balance, identity), account aggregation, payment initiation (PISP), account information (AISP), BaaS platforms (Unit, Synapse, Column), and API security (mTLS, OAuth2, FAPI). Use when integrating with banking services.

Install

npx claudepluginhub rnavarych/alpha-engineer --plugin domain-fintech

Tool Access

This skill is limited to using the following tools:

ReadGrepGlobBash

Preview

- Integrating with PSD2, UK Open Banking, or FDX APIs

Supporting Assets

references/api-security.mdreferences/open-banking-standards.mdreferences/payment-initiation.mdreferences/plaid-integration.md

SKILL.md

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Stats

Parent Repo Stars9

Parent Repo Forks0

Last CommitMar 3, 2026

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domain-fintech:banking-apis

When to use

Integrating with PSD2, UK Open Banking, or FDX APIs

Setting up Plaid Link, transaction sync, or webhook processing

Implementing payment initiation (ACH, SEPA, Faster Payments)

Choosing or evaluating a BaaS provider (Unit, Column)

Securing bank API connections with mTLS, OAuth2, or FAPI

Building account aggregation with multi-provider fallback

Core principles

Never expose access tokens client-side — exchange public_token server-side, store encrypted

Idempotent webhook processing — banking events are delivered at-least-once; deduplicate always

Consent is time-limited and revocable — model consent lifecycle explicitly, not as a boolean flag

Multi-provider normalization — abstract provider differences behind a unified internal schema

FAPI > plain OAuth2 — financial-grade APIs require sender-constrained tokens and signed requests

Reference Files

references/open-banking-standards.md — PSD2 (Berlin Group, STET, PolishAPI), UK Open Banking, FDX, AISP consent management and data categories

references/plaid-integration.md — Plaid Link flow, core products (transactions, balance, identity, auth), webhook handling, multi-provider aggregation patterns

references/payment-initiation.md — payment types (ACH, SEPA, Faster Payments), ACH origination, payment status lifecycle, BaaS platform selection (Unit, Column)

references/api-security.md — mTLS with eIDAS QWAC, OAuth 2.0 flows for banking, FAPI 1.0 Advanced requirements (JARM, PAR, DPoP, sender-constrained tokens)

Banking APIs

When to use

Integrating with PSD2, UK Open Banking, or FDX APIs
Setting up Plaid Link, transaction sync, or webhook processing
Implementing payment initiation (ACH, SEPA, Faster Payments)
Choosing or evaluating a BaaS provider (Unit, Column)
Securing bank API connections with mTLS, OAuth2, or FAPI
Building account aggregation with multi-provider fallback

Core principles

Never expose access tokens client-side — exchange public_token server-side, store encrypted
Idempotent webhook processing — banking events are delivered at-least-once; deduplicate always
Consent is time-limited and revocable — model consent lifecycle explicitly, not as a boolean flag
Multi-provider normalization — abstract provider differences behind a unified internal schema
FAPI > plain OAuth2 — financial-grade APIs require sender-constrained tokens and signed requests

Reference Files

references/open-banking-standards.md — PSD2 (Berlin Group, STET, PolishAPI), UK Open Banking, FDX, AISP consent management and data categories
references/plaid-integration.md — Plaid Link flow, core products (transactions, balance, identity, auth), webhook handling, multi-provider aggregation patterns
references/payment-initiation.md — payment types (ACH, SEPA, Faster Payments), ACH origination, payment status lifecycle, BaaS platform selection (Unit, Column)
references/api-security.md — mTLS with eIDAS QWAC, OAuth 2.0 flows for banking, FAPI 1.0 Advanced requirements (JARM, PAR, DPoP, sender-constrained tokens)